Strip brush



C. J. GROSS Sept. 29, 1942.

STRIP BRUSH Filed 001;. 9, 1940 Patented Sept. 29,1942

STRIP BRUSH Charles J. Gross, Melrose, Mam, assignor to United ShoeMachinery Corporation, Flemington, N. L, a corporation of New JerseyApplication October 9, 1940, Serial No. 360,460

9 Claims.

This invention relates to strip brush material adapted to be used in themanufacture of various types of brushes and to a method of making such astrip.

It is well understood that brush material may be prepared in strip formand then utilized for the construction of various sorts of brushes, suchas brooms, paint brushes, and the like. It is also common to employ thismaterial for the construction of rotary cylindrical brushes in which thestrip material is wound around a hub or core. The brush material,according to the use to which the brush is to be put, may be of varioussorts including animal hair, vegetable fibers, and various types ofwire. For the sake of convenience, all these types will be hereinafterreferred to as bristles" without thereby restricting the invention totrue bristles. It will be understood, furthermore, that, whil the stripmaterial which is usually employed is mild steel, the exact kind ofmaterial which is used is unimportant to the invention so long as it isself-sustaining and sumciently flexible to permit formation of the brushas desired.

A strip brush, according to the present invention, comprises asubstantially u-shaped channel strip and groups of brush elements heldin said channel by marginal teeth integral therewith and extendingacross adjacent groups of bristles to grip them on the strip. In theillustrated con: struction the strip is provided with a series ofbristle-receiving apertures or notches, and the groups of bristles arereceived in these apertures. Also, as illustrated, the teeth which holdthe bristles in place extend diagonally in respect to the axis of thestrip.

In accordance with the method, a margin of the strip is provided withteeth which are bent to hold the brush material upon the strip, afterwhich, the strip is doubled into a channel. As herein illustrativelydescribed, the method comprises also cuttin the strip to provide aseries of apertures near the edge of the strip and to form, by cutstransverse to the margin, diagonally extending teeth. These teeth arebent around a line substantially parallel to the longitudinal axis ofthe strip, usually over the body of the strip, to clamp groups ofbristles positioned in the apertures. The strip is then formed into achannel with the bristles extending out of the channel through thepreviously mentioned apertures.

The invention, in other aspects, will best be understood from aconsideration of the followin specification taken in connection with theaccompanying drawing, in which:

Fig. l is a diagrammatic view showing the successive steps in theformation of a strip brush structure in which the bristles projectoutwardly from both sides of the strip and in which the strip isprovided with teeth at each margin thereof; g r

Fig. 2 is a similar view showing a modified arrangement wherein the endsof the bristles abut the bottom of the channel and only one set of teethis required; and v Fig. 3 is a plan view of a portion of a strip showingthe diagonal arrangement of the teeth upon the margins thereof.

In the first instance, a strip I0 of flexible; selfsustaining material,which is usually metal and may be mild steel, is provided upon itsmargin with a series of apertures or notches I2 between which are teethIA. The sides of these teeth extend diagonally of the length of thestrip transversely to said margin and are formed by cuts transverse tothe margin. As the next step in the formation of the brush, although theexact order is not important, the teeth will usually be bent about aline I8 parallel to the middle or the longitudinal axis II of the stripto extend upwardly therefrom and, by providing notches I3,

will facilitate the placing of bunches or groups of bristles 20 in theapertures I2. The teeth are then bentfurther toward the body of thestrip to bring them into the position shown at 22 where they overlieadjacent groups of bristles and clamp them in position on the strip. Thestrip may then be bent progressively, as indicated at 24, to bring itinto a channel form, shown at 26, in which the teeth lie within thechannel and the bristles project upwardly therefrom, extending outthrough the apertures I2.

If desired, the arrangement illustrated in Fig.

2 may be substituted in which teeth I40 are formed between apertures I20along only one margin of the strip and in which the other margin I30 isleft plain. Preferably this marginal portion I30 is bent upwardly atright angles to the body of the strip to facilitate the'positioning ofgroups of bristles 200 in the apertures I20 with the inner ends abuttingthis margin I30. The teeth I40 are then folded over about a line I to aposition indicated at 220. After this, one margin may be bentprogressively, as at 240, until it is brought parallel to the upstandingmargin I30 to form a channel 260 with the butt ends of the bristlesclamped tightly within the channel and the flagged ends 210 projectingoutwardly thererom.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. A strip brush adapted to be wound around a core to form a rotarybrush, said strip brush comprising an elongated substantially U-shapedchannel strip and groups of brush elements transverse to the length ofsaid strip and held in said channel by teeth formed along the sidemargin of said strip and integral therewith, with the sides of the teethextending transversely to said margin and extending across adjacentgroups of bristles to grip them-against the strip.

2. A strip brush comprising a channel strip and groups of bristlesretained in the channel by means of integral teeth extending acrossadjacent groups of bristles within said channel, said teeth having theirintegral bases bent around a line parallel to the longitudinal axis ofthe strip and extending diagonally thereto.

3. A strip brush comprising a channel strip provided with a series ofbristle-receiving apertures, groups of bristles in said aperturesretained in the channel by means of teeth integral with the strip andjoined to the side of the channel between said apertures, said teethextending across adjacent groups of bristles within said channel.

4. That method of making a strip brush which consists in cutting teethupon a margin of a strip of self-sustaining flexible mitterial, placingbrush material transversely of the strip and bending the successiveteeth toward the strip to hold the brush material thereon, and thendoubling the strip into a channel with the teeth inside the channel.

5. That method of making a strip brush which consists in forming teethupon the margin of a strip of flexible self-sustaining inaterial withthe teeth extending at other than a right angle to the length of thestrip, placing brush material transversely of the strip and holding itin position thereon by folding the teeth over the brush material, andbending said strip and brush material along a longitudinal axis of thestrip to impart to the strip a substantially U-shaped cross section.

ano es e 6. That method of forming a strip brush which consists inbringing together a strip of self-sustaining flexible material, which isprovided with teeth along a margin 01 the strip, and groups or bristlesarranged transversely of the strip and projecting beyond its edges,bending these teeth across the bristles to hold the groups of bristlesto the strip, and folding the strip and bristles about an axis extendinglengthwise thereof thereby to provide a substantially U-shaped casingfor the U-shaped groups of bristles.

7. That method of forming a strip brush which consists in bringingtogether a strip of selI-sustaining flexible material which has teethprojecting from an edge thereof and groups of bristles arrangedtransverseLv of the strip and projecting beyond its edges, bending theseteeth across the bristles about a line or told parallel to th axis orthe strip to'hold the groups of bristles to the strip, and folding thestrip and bristles about an axis extending lengthwise oi the stripthereby to provide a substantially U-shaped casing for the U-shapedgroups of bristles.

8. That method of forming a strip brush which consists in assemblinggroups of bristles and a strip having a series of teeth joined to thebody of the strip and having bristle-receiving notches at the pointswhere the teeth join the strip, placing said groups in said notches,folding the teeth across the bristles to grip them to the strip, andthen bending the assembled strip into a substantially U-shaped formalong a longitudinal axis of the strip.

9. That method of forming a strip brush which consists in assemblinggroups of bristles and a strip of self-sustaining flexible materialhaving marginal teeth which extend diagonally to the length of thestrip, folding uccessive teeth about a line substantially parallel tothe longitudinal axis or the strip to overlie successive groups ofbristles thereby to grip the bristles to the strip, and folding aportion of the strip to cover said teeth and hold them and the bristlesagainst the body of the strip.

CHARLES J. GROSS.

